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<strong>单文件组件</strong>：一个文件中只包含有 1 个组件</p> <h3 id="_2-2-1-基本使用"><a href="#_2-2-1-基本使用" class="header-anchor">#</a> 2.2.1. 基本使用</h3> <p><code>Vue</code>中使用组件的三大步骤</p> <ol><li><strong>定义组件</strong></li></ol> <ul><li>使用<code>Vue.extend(options)</code>创建，其中<code>options</code>和<code>new Vue(options)</code>时传入的<code>options</code>几乎一样，但也有点区别
<ul><li><code>el</code>不要写，因为最终所有的组件都要经过一个<code>vm</code>的管理，由<code>vm</code>中的<code>el</code>才决定服务哪个容器</li> <li><code>data</code>必须写成函数，避免组件被复用时，数据存在引用关系</li></ul></li></ul> <ol start="2"><li><strong>注册组件</strong></li></ol> <ul><li>局部注册：new Vue()的时候options传入components选项</li> <li>全局注册：Vue.component('组件名',组件)</li></ul> <ol start="3"><li><strong>使用组件</strong></li></ol> <p>编写组件标签如 ·<code>&lt;school&gt;&lt;/school&gt;</code></p> <div class="language-html line-numbers-mode"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>基本使用<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
				<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>demo<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
					<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h3</span><span class="token punctuation">&gt;</span></span>学校名称：{{schoolName}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h3</span><span class="token punctuation">&gt;</span></span>
					<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h3</span><span class="token punctuation">&gt;</span></span>学校地址：{{address}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h3</span><span class="token punctuation">&gt;</span></span>
					<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>showName<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>点我提示学校名<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>	
  			<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
			`,
    data() {
      return {
        schoolName: '尚硅谷',
        address: '北京昌平'
      }
    },
    methods: {
      showName() {
        alert(this.schoolName)
      }
    },
  })

  //第一步：创建student组件
  const student = Vue.extend({
    template: `
				<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
					<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h3</span><span class="token punctuation">&gt;</span></span>学生姓名：{{studentName}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h3</span><span class="token punctuation">&gt;</span></span>
					<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h3</span><span class="token punctuation">&gt;</span></span>学生年龄：{{age}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h3</span><span class="token punctuation">&gt;</span></span>
  			<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
			`,
    data() {
      return {
        studentName: '张三',
        age: 18
      }
    }
  })

  //第一步：创建hello组件
  const hello = Vue.extend({
    template: `
				<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>	
					<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h3</span><span class="token punctuation">&gt;</span></span>你好啊！{{name}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h3</span><span class="token punctuation">&gt;</span></span>
  			<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
			`,
    data() {
      return {
        name: 'cess'
      }
    }
  })

  //第二步：全局注册组件
  Vue.component('hello', hello)

  //创建vm
  new Vue({
    el: '#root',
    data: {
      msg: '你好啊！'
    },
    //第二步：注册组件（局部注册）
    components: {
      school,
      student
    }
  })

  new Vue({
    el: '#root2',
  })
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181243093.png" alt="image.png"></p> <h3 id="_2-2-2-组件注意事项"><a href="#_2-2-2-组件注意事项" class="header-anchor">#</a> 2.2.2. 组件注意事项</h3> <p>关于组件名</p> <ul><li>一个单词组成
<ul><li>第一种写法（首字母小写）：school</li> <li>第二种写法**（首字母大写）**：School</li></ul></li> <li>多个单词组成
<ul><li>第一种写法（kebab-case 命名）：my-school</li> <li>第二种写法**（CamelCase 命名）**：MySchool（需要<code>Vue</code>脚手架支持）</li></ul></li> <li>备注
<ul><li>组件名尽可能回避<code>HTML</code>中已有的元素名称，例如：h2、H2都不行</li> <li>可以使用<code>name</code>配置项指定组件在开发者工具中呈现的名字</li></ul></li></ul> <p>关于组件标签</p> <ul><li>第一种写法：<code>&lt;school&gt;&lt;/school&gt;</code></li> <li>第二种写法：<code>&lt;school/&gt;</code>（需要Vue脚手架支持）</li> <li>备注：不使用脚手架时，<code>&lt;school/&gt;</code>会导致后续组件不能渲染</li> <li>一个简写方式：<code>const school = Vue.extend(options)</code>可简写为<code>const school = options</code>，因为父组件<code>components</code>引入的时候会自动创建</li></ul> <div class="language-html line-numbers-mode"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>几个注意点<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
	<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text/javascript<span class="token punctuation">&quot;</span></span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>../js/vue.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

	<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>root<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
		<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>{{msg}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
		<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>school</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>school</span><span class="token punctuation">&gt;</span></span>
	<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text/javascript<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
	Vue<span class="token punctuation">.</span>config<span class="token punctuation">.</span>productionTip <span class="token operator">=</span> <span class="token boolean">false</span>

	<span class="token comment">//定义组件</span>
	<span class="token keyword">const</span> school <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
		<span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'atguigu'</span><span class="token punctuation">,</span> <span class="token comment">// 组件给自己起个名字，用于在浏览器开发工具上显示</span>
		<span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
				&lt;div&gt;
					&lt;h3&gt;学校名称：{{name}}&lt;/h3&gt;	
					&lt;h3&gt;学校地址：{{address}}&lt;/h3&gt;	
				&lt;/div&gt;
			</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
		<span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
			<span class="token keyword">return</span> <span class="token punctuation">{</span>
				<span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'杭州电子科技大学'</span><span class="token punctuation">,</span>
				<span class="token literal-property property">address</span><span class="token operator">:</span> <span class="token string">'杭州'</span>
			<span class="token punctuation">}</span>
		<span class="token punctuation">}</span>
	<span class="token punctuation">}</span><span class="token punctuation">)</span>

	<span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
		<span class="token literal-property property">el</span><span class="token operator">:</span> <span class="token string">'#root'</span><span class="token punctuation">,</span>
		<span class="token literal-property property">data</span><span class="token operator">:</span> <span class="token punctuation">{</span>
			<span class="token literal-property property">msg</span><span class="token operator">:</span> <span class="token string">'欢迎学习Vue!'</span>
		<span class="token punctuation">}</span><span class="token punctuation">,</span>
		<span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span>
			school
		<span class="token punctuation">}</span>
	<span class="token punctuation">}</span><span class="token punctuation">)</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br></div></div><h3 id="_2-2-3-组件的嵌套"><a href="#_2-2-3-组件的嵌套" class="header-anchor">#</a> 2.2.3. 组件的嵌套</h3> <p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181245102.png" alt="img"></p> <div class="language-html line-numbers-mode"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>组件的嵌套<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text/javascript<span class="token punctuation">&quot;</span></span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>../js/vue.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>root<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text/javascript<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  Vue<span class="token punctuation">.</span>config<span class="token punctuation">.</span>productionTip <span class="token operator">=</span> <span class="token boolean">false</span>

  <span class="token comment">//定义student组件</span>
  <span class="token keyword">const</span> student <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'student'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
				&lt;div&gt;
					&lt;h4&gt;学生姓名：{{name}}&lt;/h4&gt;	
					&lt;h4&gt;学生年龄：{{age}}&lt;/h4&gt;	
  			&lt;/div&gt;
			</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'尚硅谷'</span><span class="token punctuation">,</span><span class="token literal-property property">age</span><span class="token operator">:</span> <span class="token number">18</span><span class="token punctuation">}</span><span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token comment">//定义school组件</span>
  <span class="token keyword">const</span> school <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'school'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
				&lt;div&gt;
					&lt;h3&gt;学校名称：{{name}}&lt;/h3&gt;	
					&lt;h3&gt;学校地址：{{address}}&lt;/h3&gt;	
					&lt;student&gt;&lt;/student&gt;
 			  &lt;/div&gt;
			</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'尚硅谷'</span><span class="token punctuation">,</span><span class="token literal-property property">address</span><span class="token operator">:</span> <span class="token string">'北京'</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token comment">//注册组件（局部）</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> student <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token comment">//定义hello组件</span>
  <span class="token keyword">const</span> hello <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">&lt;h3&gt;{{msg}}&lt;/h3&gt;</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">msg</span><span class="token operator">:</span> <span class="token string">'欢迎来到尚硅谷学习！'</span><span class="token punctuation">}</span><span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token comment">//定义app组件</span>
  <span class="token keyword">const</span> app <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
				&lt;div&gt;	
					&lt;hello&gt;&lt;/hello&gt;
					&lt;school&gt;&lt;/school&gt;
  			&lt;/div&gt;
			</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> school<span class="token punctuation">,</span> hello <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token comment">//创建vm</span>
  <span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">el</span><span class="token operator">:</span> <span class="token string">'#root'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token string">'&lt;app&gt;&lt;/app&gt;'</span><span class="token punctuation">,</span>
    <span class="token comment">//注册组件（局部）</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> app <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181245971.png" alt="image.png"></p> <h3 id="_2-2-4-vuecomponent"><a href="#_2-2-4-vuecomponent" class="header-anchor">#</a> 2.2.4. VueComponent</h3> <p>关于 <strong>VueComponent</strong></p> <ol><li><strong>school</strong> 组件本质是一个名为<code>VueComponent</code>的构造函数，且不是程序员定义的，而是<code>Vue.extend()</code> 生成的</li> <li>我们只需要写<code>&lt;school/&gt;</code> 或<code>&lt;school&gt;&lt;/school&gt;</code>，Vue 解析时会帮我们创建<code>school</code>组件的实例对象，即<code>Vue</code>帮我们执行的<code>new VueComponent(options)</code></li> <li>每次调用<code>Vue.extend</code>，返回的都是一个全新的<code>VueComponent</code>，即不同组件是不同的对象</li> <li>关于<code>this</code>指向
<ol><li>组件配置中<code>data</code>函数、<code>methods</code>中的函数、<code>watch</code>中的函数、<code>computed</code>中的函数 它们的<code>this</code>均是 <code>VueComponent实例对象</code></li> <li><code>new Vue(options)</code>配置中：<code>data</code>函数、<code>methods</code>中的函数、<code>watch</code>中的函数、<code>computed</code>中的函数 它们的<code>this</code>均是<code>Vue</code>实例对象</li></ol></li> <li><code>eVueComponent</code>的实例对象，以后简称<code>vc</code>（组件实例对象）<code>Vue的实例对象</code>，以后简称<code>vm</code></li></ol> <div class="language-html line-numbers-mode"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>VueComponent<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text/javascript<span class="token punctuation">&quot;</span></span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>../js/vue.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>root<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>school</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>school</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>hello</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>hello</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text/javascript<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  Vue<span class="token punctuation">.</span>config<span class="token punctuation">.</span>productionTip <span class="token operator">=</span> <span class="token boolean">false</span>

  <span class="token comment">// 定义school组件</span>
  <span class="token keyword">const</span> school <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'school'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
				&lt;div&gt;
					&lt;h2&gt;学校名称：{{name}}&lt;/h2&gt;	
					&lt;h2&gt;学校地址：{{address}}&lt;/h2&gt;	
					&lt;button @click=&quot;showName&quot;&gt;点我提示学校名&lt;/button&gt;
  			&lt;/div&gt;
			</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'尚硅谷'</span><span class="token punctuation">,</span><span class="token literal-property property">address</span><span class="token operator">:</span> <span class="token string">'北京'</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span><span class="token function">showName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'showName'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">)</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token keyword">const</span> test <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">&lt;span&gt;atguigu&lt;/span&gt;</span><span class="token template-punctuation string">`</span></span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token comment">// 定义hello组件</span>
  <span class="token keyword">const</span> hello <span class="token operator">=</span> Vue<span class="token punctuation">.</span><span class="token function">extend</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">
				&lt;div&gt;
					&lt;h2&gt;{{msg}}&lt;/h2&gt;
					&lt;test&gt;&lt;/test&gt;	
  			&lt;/div&gt;
			</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">msg</span><span class="token operator">:</span> <span class="token string">'你好啊！'</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> test <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>

  <span class="token comment">// console.log('@',school)</span>
  <span class="token comment">// console.log('#',hello)</span>

  <span class="token comment">// 创建vm</span>
  <span class="token keyword">const</span> vm <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">el</span><span class="token operator">:</span> <span class="token string">'#root'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> school<span class="token punctuation">,</span> hello <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br></div></div><h3 id="_2-2-5-一个重要的内置关系"><a href="#_2-2-5-一个重要的内置关系" class="header-anchor">#</a> 2.2.5. 一个重要的内置关系</h3> <p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181248307.png" alt="image.png"></p> <p>1一个重要的内置关系：<code>VueComponent.prototype.__proto__ === Vue.prototype</code>
2为什么要有这个关系：让组件实例对象<code>vc</code>可以访问到 <code>Vue原型</code>上的属性、方法</p> <h2 id="_2-3-单文件组件"><a href="#_2-3-单文件组件" class="header-anchor">#</a> 2.3. 单文件组件</h2> <ul><li><code>school.vue</code></li></ul> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">'</span>Demo<span class="token punctuation">'</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学校名称：{{name}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学校地址：{{address}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>showName<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>点我提示学校名<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
    <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'School'</span><span class="token punctuation">,</span>
        <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span> <span class="token punctuation">{</span>
                <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'UESTC'</span><span class="token punctuation">,</span>
                <span class="token literal-property property">address</span><span class="token operator">:</span><span class="token string">'成都'</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
            <span class="token function">showName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
                <span class="token function">alert</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>name<span class="token punctuation">)</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
    <span class="token selector">#Demo</span><span class="token punctuation">{</span>
        <span class="token property">background</span><span class="token punctuation">:</span> orange<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br></div></div><ul><li><code>student.vue</code></li></ul> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生姓名：{{name}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生年龄：{{age}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
    <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'Student'</span><span class="token punctuation">,</span>
        <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">return</span> <span class="token punctuation">{</span>
                <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'cess'</span><span class="token punctuation">,</span>
                <span class="token literal-property property">age</span><span class="token operator">:</span><span class="token number">20</span>
            <span class="token punctuation">}</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br></div></div><ul><li><code>app.vue</code></li></ul> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>School</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>School</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Student</span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>Student</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
    <span class="token keyword">import</span> School <span class="token keyword">from</span> <span class="token string">'./School.vue'</span>
    <span class="token keyword">import</span> Student <span class="token keyword">from</span> <span class="token string">'./Student.vue'</span>

    <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'App'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">components</span><span class="token operator">:</span><span class="token punctuation">{</span>
            School<span class="token punctuation">,</span>
            Student
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br></div></div><ul><li><code>main.js</code></li></ul> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">import</span> App <span class="token keyword">from</span> <span class="token string">'./App.vue'</span>

<span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    <span class="token literal-property property">template</span><span class="token operator">:</span><span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">&lt;App&gt;&lt;/App&gt;</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">,</span>
    <span class="token literal-property property">el</span><span class="token operator">:</span><span class="token string">'#root'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span><span class="token punctuation">{</span>App<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><div class="language-html line-numbers-mode"><pre class="language-html"><code>
<span class="token doctype"><span class="token punctuation">&lt;!</span><span class="token doctype-tag">DOCTYPE</span> <span class="token name">html</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>html</span> <span class="token attr-name">lang</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>en<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>head</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>meta</span> <span class="token attr-name">charset</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>UTF-8<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>meta</span> <span class="token attr-name">http-equiv</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>X-UA-Compatible<span class="token punctuation">&quot;</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>IE=edge<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>meta</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>viewport<span class="token punctuation">&quot;</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>width=device-width, initial-scale=1.0<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>title</span><span class="token punctuation">&gt;</span></span>单文件组件练习<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>title</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>head</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>body</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>root<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>../../js/vue.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>./main.js<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token script"></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>body</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>html</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br></div></div></div></section> <footer class="page-edit"><!----> <!----></footer> <!----> <div class="comments-wrapper"><!----></div></main></div> <!----></div> <ul class="sub-sidebar sub-sidebar-wrapper" style="width:0;" data-v-b57cc07c data-v-7dd95ae2></ul></div></div></div><div class="global-ui"><div class="back-to-ceiling" style="right:1rem;bottom:6rem;width:2.5rem;height:2.5rem;border-radius:.25rem;line-height:2.5rem;display:none;" data-v-c6073ba8 data-v-c6073ba8><svg t="1574745035067" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5404" class="icon" data-v-c6073ba8><path d="M526.60727968 10.90185116a27.675 27.675 0 0 0-29.21455937 0c-131.36607665 82.28402758-218.69155461 228.01873535-218.69155402 394.07834331a462.20625001 462.20625001 0 0 0 5.36959153 69.94390903c1.00431239 6.55289093-0.34802892 13.13561351-3.76865779 18.80351572-32.63518765 54.11355614-51.75690182 118.55860487-51.7569018 187.94566865a371.06718723 371.06718723 0 0 0 11.50484808 91.98906777c6.53300375 25.50556257 41.68394495 28.14064038 52.69160883 4.22606766 17.37162448-37.73630017 42.14135425-72.50938081 72.80769204-103.21549295 2.18761121 3.04276886 4.15646224 6.24463696 6.40373557 9.22774369a1871.4375 1871.4375 0 0 0 140.04691725 5.34970492 1866.36093723 1866.36093723 0 0 0 140.04691723-5.34970492c2.24727335-2.98310674 4.21612437-6.18497483 6.3937923-9.2178004 30.66633723 30.70611158 55.4360664 65.4791928 72.80769147 103.21549355 11.00766384 23.91457269 46.15860503 21.27949489 52.69160879-4.22606768a371.15156223 371.15156223 0 0 0 11.514792-91.99901164c0-69.36717486-19.13165746-133.82216804-51.75690182-187.92578088-3.42062944-5.66790279-4.76302748-12.26056868-3.76865837-18.80351632a462.20625001 462.20625001 0 0 0 5.36959269-69.943909c-0.00994388-166.08943902-87.32547796-311.81420293-218.6915546-394.09823051zM605.93803103 357.87693858a93.93749974 93.93749974 0 1 1-187.89594924 6.1e-7 93.93749974 93.93749974 0 0 1 187.89594924-6.1e-7z" p-id="5405" data-v-c6073ba8></path><path d="M429.50777625 765.63860547C429.50777625 803.39355007 466.44236686 1000.39046097 512.00932183 1000.39046097c45.56695499 0 82.4922232-197.00623328 82.5015456-234.7518555 0-37.75494459-36.9345906-68.35043303-82.4922232-68.34111062-45.57627738-0.00932239-82.52019037 30.59548842-82.51086798 68.34111062z" p-id="5406" data-v-c6073ba8></path></svg></div></div></div>
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